Christopher Schwarzenegger at the Long Beach Convention Center last year. (Dr. Billy Ingram/ Wire Image)

The youngest child of Arnold Schwarzenegger and Maria Shriver was released from a hospital Monday, more than a week after a serious swimming accident. Christopher Schwarzenegger, 13, suffered broken bones and a collapsed lung while boogie-boarding in Malibu July 17. “What a feeling of relief to know he’s going to be fine,” Shriver tweeted Tuesday.